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ASTM D5769 Aromatics in Finished Gasoline Cal Std #2 w/o IS in Isooctane
ααα (20R,24R)-24-Ethylcholestane
氨基脲 盐酸盐 标准品
Chlorotoluron
First Standard® 丙酮中39种农药混标溶液(GCMS&LCMS),100μg/mL
Perfluorobutyric acid (无证书)
甲醇/二甲亚砜中卡巴多
1,1,2-Trichloro-1,2,2-trifluoroethane 标准品
ACETYL-L-TYROSINE ETHYLESTER, N-(RG) 标准品
Methyl isothiocyanate